组IIIA元素杂BaSnS2作为中频段太阳能电池的高效吸收器从一个第一原则的洞察力来看
Yang Xue1, Changqing Lin1, Jiancheng Zhong1
1Guangxi Novel Battery Materials Research Center of Engineering Technology, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, School of Physical Science and Technology, Guangxi University, Nanning 530004, China. danhuang@gxu.edu.cn.
Physical chemistry chemical physics : PCCP
|February 26, 2024
概括
研究人员探索了BaSnS2的兴奋剂,以创建中间带太阳能电池 (IBSC). 组IIIA元素染成功产生了中间频段,超过了Shockley-Queisser极限,提高了太阳能电池的效率.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 可再生能源可再生能源是可再生能源.
背景情况:
- 肖克利-奎塞尔极限限制单节太阳能电池的效率为~31%.
- 中间频段太阳能电池 (IBSC) 通过结合中间频段 (IB) 提供了一条超越这个极限的途径.
- BaSnS2 具有适合接收 IB 的带隙.
研究的目的:
- 研究BaSnS2兴奋剂的潜力,以创建高效太阳能电池的中间频段.
- 为了确定IIIA组元素兴奋剂 (Al,Ga,In) 对BaSnS2.2电子结构的影响.
- 理论评估用于IBSC应用的化BaSnS2的功率转换效率.
主要方法:
- 使用混合功能计算来研究BaSnS2.2的兴奋剂.
- 分析了不同地点的兴奋剂的形成能量.
- 在一个阳光照明下计算了理论功率转换效率.
主要成果:
- 在Sn位点用Al,Ga和In对BaSn2进行兴奋剂,在带间隙内形成了隔离的和半充满的中间带.
- 在25%的兴奋剂度下,实现了39.0% (Al),44.3% (Ga) 和39.7% (In) 的理论效率.
- 组IIIA元素在替换Sn位点时表现出较低的形成能量,从而促进IB的形成.
结论:
- 对BaSnS2的IIIA组元素化是开发高效中频段太阳能电池的一个有前途的战略.
- 产生的中间频段可以实现三条带边的吸收,超过了单个接口的Shockley-Queisser极限.
- 化BaSnS2为下一代光伏提供了可行的高性能吸收材料.
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